While we don’t know how they refer to their other grandmother, Carole Middleton, Prince William did reveal in the documentary Diana, Our Mother: Her Life and Legacy that he refers to his mum, Princess Diana, as “Granny Diana” when discussing her with the kids. He also joked she would have been a “nightmare grandmother” as she wouldn’t have left them alone.

While members of the royal family are generally absent from social media (Meghan Markle deleted her accounts upon announcing her engagement to Prince Harry) The Telegraph claims Prince Harry was active on Facebook in 2012, signed up under the name “Spike Wells”.

The rather fanciful pseudonym was believed to be a nod to the prince’s nickname Spike, which was used among friends and even by his Scotland Yard minder.